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{
"metadata": {
"name": "",
"signature": "sha256:19f2a8cb1c6de61d0a56800f8e56bd9bad7dc4e03b58a655a7a7ff910f23e6d6"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 6: Solar Photovoltaic Systems"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex6.1:Pg-162"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Given data :\n",
"import math\n",
"T=27 +273 # temperature converted in kelvin\n",
"NV=1e22 # effective density of states in valence band in cm^(-3)\n",
"NA=1e19 # acceptor density in cm^(-3)\n",
"k=8.629*10**(-5) # boltzmann constant in eV/K\n",
"EFV=k*T*math.log(NV/NA) # closeness of fermi level i.e Ef-Ev\n",
"print \"Closeness of fermi level with valence bond is\",round(EFV,4),\"eV\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Closeness of fermi level with valence bond is 0.1788 eV\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex6.2:Pg-165"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Given data :\n",
"E =2.42 # Band gap in eV\n",
"hc=1.24 # planck's constant * speed of light\n",
"# solution\n",
"Lambda=1.24/E # in micro-meter usinf eq 6.4\n",
"\n",
"print \"The optimum wavelength is \",round(Lambda,3),\" micro meter\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The optimum wavelength is 0.512 micro meter\n"
]
}
],
"prompt_number": 20
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex6.3:Pg-182"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Given data :\n",
"Pout=1*735 # motor power output in W\n",
"Peffi=0.85 # motor efficiency\n",
"cellarea=9*4*125*125e-6 # area in m^2 \n",
"Rad=1000 #incident radiation in kW/m^2\n",
"celleffi=0.12 # cell efficiency\n",
"\n",
"# soln.\n",
"Pin=Pout/Peffi # power req by motor in W\n",
"N=Pin/(Rad*cellarea*celleffi) # number of modules\n",
"\n",
"print round(N),\" number of modules are required\" \n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"13.0 number of modules are required\n"
]
}
],
"prompt_number": 22
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex6.4:Pg-185"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# given:\n",
"noMPPTpower=10*8 # power without MPPT in W from fig 6.25\n",
"MaxP=25*5 # maximum power by PV module in W from fig 6.25\n",
"effi=0.95 # efficiency of MPPT\n",
"MPPTcost=4000 # Cost in rupees\n",
"# Soln\n",
"Pact=MaxP*effi # actual power produced in W\n",
"Psurplus=Pact-noMPPTpower # Surplus power in W\n",
"t=MPPTcost/(3*Psurplus/1000) # time required in hours \n",
"print \"time required is \",round(t,2),\"hours\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"time required is 34408.6 hours\n"
]
}
],
"prompt_number": 24
}
],
"metadata": {}
}
]
}
|
